Smoking, Cancer, and Other Diseases
Although non-smokers are not immune to lung cancer, cigarette smoking is by far the most important risk factor for this disease.
Compared with those who continue to smoke, people who do quit before they are 50 years old cut in half their risk of dying in the next 15 years.
In smokers who have been treated for lung cancer, quitting smoking lowers their risk of lung cancer recurrence.
Smoking harms nearly every organ of the body and causes a variety of cancers including lung, throat, kidney, bladder, pancreatic, stomach, cervical cancer and acute myeloid leukemia.
90% of lung cancer deaths among men and approximately 80% of lung cancer deaths among women are caused by smoking.
Besides cancer, smoking also causes heart disease and most cases of chronic lung diseases such as emphysema and bronchitis.